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Disappearing Fault Messages After Battery Replacement

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  • Disappearing Fault Messages After Battery Replacement

    Yesterday, I went to start my 2019 Prado, after it had not been started for about one and a half weeks. A six months service was booked for today and the vehicle was purchased four years ago tomorrow. Well, no start, a dead battery (its original) would not let me get the vehicle out of the garage. A tester showed 9.8V across that battery. Four years from a modern battery is pretty good.

    A RACQ roadside assist came with a new battery, and the technician replaced the battery using a his 12V portable battery to keep 12V active during the changeover. Of course, the car started but showed "Check Engine", "Pre Crash Safety Malfunction" and "See Dealer". We did not clear the faults but left them as the service visit was already booked for today. Later, yesterday, I started the vehicle a couple of times and parked the vehicle in front of my residence without driving anywhere else.

    After a couple of hours when I went to move the vehicle back into the garage, and surprisingly to me, there were no fault messages on my screen, all clear.
    A rep at the dealer said sometimes things can take a while to settle in again.
    Anyway, just thought that I would post my recent experience in case others had something similar.
    2019 Prado GXL 2.8L Diesel
    2022 Jimny too

  • #2
    Yes the car ECUs have a few sensor relearning activities and calibrations to do after a flat battery or disconnection for an extended period.

    From memory those messages will most likely be linked to the Steering Angle sensor zero point needing to be reset by driving straight for a while so will automatically clear once you have done that.
    You may also need to reset your window switch Auto limits using the initialization procedure in the Operator Manual.

    Comment


    • #3
      ptommo59,
      Thanks for your response. Following you post, I checked my windows and all seem to be operating as normal. Hopefully nothing unusual with the vehicle will appear later.
      2019 Prado GXL 2.8L Diesel
      2022 Jimny too

      Comment

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